An internal balancing device for a compression ignition gas shut-off valve

Abstract

The utility model relates to gas valve technical field especially relates to a kind of inner balancing device of pressure gas cut-off valve, solve the problem that the inner balancing device lacks pressure relief temporary storage structure in prior art, leading to high-pressure gas direct discharge causes resource waste and there is security risk problem.A kind of inner balancing device of pressure gas cut-off valve, including valve body, the air inlet pipe connected in the one side of valve body and the exhaust pipe connected in the other side of valve body, the top of valve body is detachably connected with mounting plate, the top of mounting plate is provided with temporary storage cylinder, the top center of mounting plate is fixedly connected with bottom adjusting cylinder, the bottom center of temporary storage cylinder is fixedly connected with top adjusting cylinder.The utility model stores pressure relief gas temporarily by temporary storage cylinder, and is guided into exhaust pipe by controllable conveying structure, avoids gas direct discharge, reduces energy waste, reduces noise and security risk.

Description

Technical Field

[0001] This utility model relates to the field of gas valve technology, and in particular to an internal balancing device for a pressure gas shut-off valve. Background Technology

[0002] The internal balancing device of a high-pressure gas shut-off valve is a key safety component in medium- and high-pressure gas transmission and distribution systems. It is primarily used to balance the pressure inside and outside the valve cavity during emergency shut-off or reset, reducing operating torque and ensuring smooth and reliable valve operation. As the core structure for achieving rapid response and safe reset of the gas shut-off valve, its design rationality and functional integrity have a decisive impact on the operational safety, sealing reliability, and ease of operation of the entire gas system.

[0003] Utility model patent CN 212155938 U discloses an internal balancing device for a medium- and high-pressure gas shut-off valve. While this device achieves initial pressure balance in the valve chamber through structures such as the vent hole on the upper valve core cover, the internal balancing valve port on the lower valve core cover, and the vent grooves on both sides of the guide boss, making the reset process smoother and safer and effectively reducing the risk of misoperation, this internal balancing device lacks any pressure relief storage structure. When high-pressure gas in the valve chamber is discharged through the vent grooves and vent hole, it is directly discharged into the atmosphere or downstream pipelines. This not only wastes gas resources but may also cause noise, airflow impact, or even local gas concentration accumulation due to instantaneous exhaust, posing potential safety hazards. Under frequent opening and closing or commissioning conditions, this direct discharge method without recovery or buffering will exacerbate energy loss and increase operating costs, failing to meet the current requirements of gas systems for energy conservation, environmental protection, and efficient resource utilization. Utility Model Content

[0004] The purpose of this invention is to provide an internal balancing device for a pressure-controlled gas shut-off valve, which solves the problem that in the prior art, the internal balancing device does not have any pressure relief and storage structure. When the high-pressure gas in the valve cavity is discharged through the vent groove and vent hole, it is directly discharged into the atmosphere or downstream pipeline, which not only wastes gas resources, but may also cause noise, airflow impact, or even local gas concentration accumulation due to instantaneous exhaust, bringing potential safety hazards.

[0005] To achieve the above objectives, this utility model provides an internal balancing device for a compressed gas shut-off valve, including a valve body, an inlet pipe connected to one side of the valve body, and an exhaust pipe connected to the other side of the valve body. A mounting plate is detachably connected to the top of the valve body, a temporary storage cylinder is provided on the top of the mounting plate, a bottom adjusting cylinder is fixedly connected to the center of the top of the mounting plate, and a top adjusting cylinder is fixedly connected to the center of the bottom of the temporary storage cylinder. The bottom of the temporary storage cylinder is connected to the outer ring of the bottom adjusting cylinder through a connecting structure. The valve body is provided with a sealing plate inside. A lifting rod with one end passing through the bottom adjusting cylinder and the top adjusting cylinder is fixedly connected to the top of the sealing plate. The top and bottom of the outer ring of the lifting rod are provided with external threads, and the inner rings of the bottom adjusting cylinder and the top adjusting cylinder are provided with internal threads. The lifting rod has an internal tube inside. One end of the internal tube passes through the end of the lifting rod and the sealing plate and communicates with the bottom of the valve body. The other end passes through the top of the lifting rod and communicates with the inside of the temporary storage cylinder. A solenoid valve is connected to the top of the internal tube. A rotating rod is connected to the top of the outer ring of the lifting rod through a docking structure. One end of the rotating rod is threaded through the top of the temporary storage cylinder. One side of the temporary storage cylinder is connected to the exhaust pipe through a conveying structure.

[0006] The connecting structure includes a connecting ring and two connecting rods. The connecting ring is fixedly connected to the outer ring of the bottom adjusting cylinder, and one end of the connecting rod is connected to the connecting ring, while the other end is connected to the bottom of the temporary storage cylinder.

[0007] The mounting plate is connected to the top of the valve body by a number of positioning screws, and a sealing ring is connected to the bottom of the mounting plate.

[0008] The connecting rod is made of metal, and its top end is fixedly connected to the bottom of the temporary storage cylinder with bolts.

[0009] The docking structure includes a U-shaped frame, with the two vertical ends of the U-shaped frame fixedly connected to both sides of the lifting rod, and the end of the rotating rod fixedly connected to the top of the U-shaped frame.

[0010] The conveying structure includes a flow pipe and a second solenoid valve connected to one side of the flow pipe. One end of the flow pipe is connected to a temporary storage cylinder, and the other end is connected to an exhaust pipe.

[0011] This utility model discloses an internal balancing device for a pressure-relief gas shut-off valve. By installing a detachable mounting plate on the top of the valve body, and integrating a temporary storage cylinder, a top adjusting cylinder, and a bottom adjusting cylinder on it, along with an internal pipe penetrating the sealing plate and the lifting rod, and a solenoid valve, a complete pressure relief gas recovery and temporary storage path is constructed. This allows high-pressure gas that would otherwise be directly discharged to be temporarily stored in the temporary storage cylinder, avoiding energy waste. The temporarily stored gas can be introduced into the exhaust pipe through a conveying structure for reuse or orderly release, significantly reducing the noise, airflow impact, and local gas accumulation risks generated by instantaneous exhaust, and improving operational safety. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0013] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0014] Figure 2 This is a structural schematic diagram of the lifting rod and internal tube according to an embodiment of the present invention.

[0015] Figure 3 This is a schematic diagram of the flow pipe and solenoid valve two according to an embodiment of the present invention.

[0016] Figure 4 This is a schematic diagram of the U-shaped frame and rotating rod according to an embodiment of the present invention.

[0017] Figure 5 This is a schematic diagram of the connecting ring and connecting rod according to an embodiment of the present invention.

[0018] In the diagram: 1. Valve body; 2. Inlet pipe; 3. Temporary storage cylinder; 4. Exhaust pipe; 5. Lifting rod; 6. Sealing plate; 7. Internal pipe; 8. Solenoid valve one; 9. Solenoid valve two; 10. Flow pipe; 11. External thread; 12. U-shaped bracket; 13. Rotating rod; 14. Bottom adjusting cylinder; 15. Connecting rod; 16. Connecting ring; 17. Top adjusting cylinder; 18. Mounting plate. Detailed Implementation

[0019] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention. Example 1

[0020] Please see Figure 1-5 As shown, the internal balance device of the compressed gas shut-off valve in this embodiment includes a valve body 1, an inlet pipe 2 connected to one side of the valve body 1 and an exhaust pipe 4 connected to the other side of the valve body 1. The top of the valve body 1 is detachably connected to an mounting plate 18. A temporary storage cylinder 3 is provided on the top of the mounting plate 18. A bottom adjusting cylinder 14 is fixedly connected to the center of the top of the mounting plate 18. A top adjusting cylinder 17 is fixedly connected to the center of the bottom of the temporary storage cylinder 3. The bottom of the temporary storage cylinder 3 is connected to the outer ring of the bottom adjusting cylinder 14 through a connecting structure. The valve body 1 is provided with a sealing plate 6. The top of the sealing plate 6 is fixedly connected to a lifting rod 5 that passes through the bottom adjusting cylinder 14 and the top adjusting cylinder 17. The top and bottom of the outer ring of the lifting rod 5 are provided with external threads 11, and the inner rings of the bottom adjusting cylinder 14 and the top adjusting cylinder 17 are provided with internal threads. The lifting rod 5 has an internal tube 7 inside. One end of the internal tube 7 passes through the end of the lifting rod 5 and the sealing plate 6 and communicates with the bottom of the valve body 1. The other end passes through the top of the lifting rod 5 and communicates with the inside of the temporary storage cylinder 3. The top of the internal tube 7 is connected to a solenoid valve 8. The top of the outer ring of the lifting rod 5 is connected to a rotating rod 13 through a docking structure. One end of the rotating rod 13 is threaded through the top of the temporary storage cylinder 3. One side of the temporary storage cylinder 3 is connected to the exhaust pipe 4 through a conveying structure.

[0021] In actual operation, the working process of the internal balancing device of the gas shut-off valve is as follows: When the gas shut-off valve is in the closed state and high pressure is formed inside the valve body 1 due to the accumulation of upstream pressure, if a reset or opening operation is required, the solenoid valve 8 is first activated by an external control signal to open the internal pipe 7; at this time, the high-pressure gas at the bottom of the valve body 1 flows upward through the internal pipe 7 that passes through the sealing plate 6 and the lifting rod 5, and enters the temporary storage cylinder 3 for temporary storage; at the same time, the sealing plate 6 drives the lifting rod 5 to move up and down under the action of the valve cavity pressure change or the drive mechanism, and the external threads 11 at the top and bottom of the outer ring of the lifting rod 5 respectively cooperate with the internal threads of the top adjusting cylinder 17 and the bottom adjusting cylinder 14 to achieve stable guidance and sealing of the passage of the internal pipe 7 during the lifting process; when the gas pressure in the temporary storage cylinder 3 is... Once the set value is reached or the reset action is completed, the lifting rod 5 can be finely adjusted by rotating the rotating rod 13, one end of which is threaded through the top of the temporary storage cylinder 3 and connected to the top of the outer ring of the lifting rod 5 through a docking structure. This allows for precise control of the opening and closing state of the internal pipe 7 or adjustment of the temporary storage volume. The gas stored in the temporary storage cylinder 3 is not directly discharged but is transported to the exhaust pipe 4 through a conveying structure, where it can selectively flow back to the downstream low-pressure pipeline network or be used for other auxiliary purposes. Throughout the process, the mounting plate 18 serves as a detachable interface connecting the valve body 1 and the temporary storage cylinder 3, facilitating maintenance and repair. The intake pipe 2 continuously supplies upstream gas, while the temporary storage cylinder 3 forms a linkage sealing structure with the lifting rod 5 through the bottom adjusting cylinder 14 and the top adjusting cylinder 17, ensuring the sealing reliability of the high-pressure gas during the balancing and temporary storage process and preventing leakage. Example 2

[0022] Please see Figure 1-5As shown, the internal balancing device of the compressed gas shut-off valve in this embodiment includes a connecting ring 16 and two connecting rods 15. The connecting ring 16 is fixedly connected to the outer ring of the bottom adjusting cylinder 14. One end of the connecting rod 15 is connected to the connecting ring 16, and the other end is connected to the bottom of the temporary storage cylinder 3. Specifically, by fixing the connecting ring 16 to the outer ring of the bottom adjusting cylinder 14, and by connecting one end of the two connecting rods 15 to the connecting ring 16 and the other end to the bottom of the temporary storage cylinder 3, after the temporary storage cylinder 3 is installed, the connecting rods 15 and the connecting ring 16 together form a rigid support frame, stably suspending the temporary storage cylinder 3 above the bottom adjusting cylinder 14, avoiding displacement or loosening of the temporary storage cylinder 3 due to internal gas pressure fluctuations or external vibrations. This structure ensures that the top adjusting cylinder 17 and the bottom adjusting cylinder 14 remain coaxially aligned during the movement of the lifting rod 5, thereby improving the overall structural stability, ensuring the accuracy of the threaded sealing fit, and preventing gas leakage.

[0023] The connecting rod 15 is made of metal, and its top end is bolted to the bottom of the temporary storage cylinder 3. Specifically, by making the connecting rod 15 of metal and bolting its top end to the bottom of the temporary storage cylinder 3, the metal material gives the connecting rod 15 sufficient strength and rigidity to withstand the weight of the temporary storage cylinder 3 and the internal air pressure load. The bolted connection method facilitates disassembly, replacement, or cleaning of the temporary storage cylinder 3 when needed. This design improves maintainability while ensuring structural robustness, thereby enhancing support reliability, extending the service life of the device, and adapting to long-term operation under medium and high pressure conditions. Example 3

[0024] Please see Figure 1-5 As shown in this embodiment, an internal balancing device for a pressure gas shut-off valve has a mounting plate 18 connected to the top of the valve body 1 via several positioning screws, and a sealing ring connected to the bottom of the mounting plate 18. Specifically, the mounting plate 18 is connected to the top of the valve body 1 via several positioning screws, and the bottom of the mounting plate 18 is connected to the sealing ring. During installation or maintenance, the positioning screws can be disassembled for quick assembly and disassembly. The sealing ring forms an effective sealing interface after the mounting plate 18 and the valve body 1 are in contact, preventing high-pressure gas inside the valve body 1 from escaping from the connection gap. This structure takes into account both ease of assembly and sealing reliability, achieving the effects of easy maintenance and repair, ensuring long-term sealing at the interface, and avoiding safety hazards caused by gas leakage.

[0025] The docking structure includes a U-shaped frame 12, with its two vertical ends fixedly connected to both sides of the lifting rod 5. The end of the rotating rod 13 is fixedly connected to the top of the U-shaped frame 12. Specifically, by fixing the two vertical ends of the U-shaped frame 12 to both sides of the lifting rod 5 and the end of the rotating rod 13 to the top of the U-shaped frame 12, when the operator rotates the rotating rod 13, the torque is evenly transmitted to both sides of the lifting rod 5 through the U-shaped frame 12, avoiding single-point force that could cause the lifting rod 5 to tilt or jam. This docking structure ensures that the lifting rod 5 rotates smoothly or moves slightly axially during adjustment, thereby improving the smoothness and accuracy of the adjustment operation and preventing wear of the threaded parts or seal failure.

[0026] The conveying structure includes a flow pipe 10 and a solenoid valve 9 connected to one side of the flow pipe 10. One end of the flow pipe 10 is connected to a temporary storage cylinder 3, and the other end is connected to an exhaust pipe 4. Specifically, the flow pipe 10 is connected to the temporary storage cylinder 3 at one end and the exhaust pipe 4 at the other end. The solenoid valve 9 is installed on one side of the flow pipe 10. After the gas has been buffered and temporarily stored in the temporary storage cylinder 3, the gas can be guided into the exhaust pipe 4 in an orderly manner as needed by controlling the opening and closing of the solenoid valve 9, so as to achieve controllable emission or reuse. This conveying structure avoids the direct venting of gas, thereby reducing energy waste, reducing instantaneous exhaust noise and impact, improving the environmental friendliness and safety of the system, and supporting intelligent scheduling and control.

[0027] In actual operation, the complete working process of the internal balancing device of the gas shut-off valve is as follows: When the gas shut-off valve is in the closed state, high-pressure gas accumulates at the bottom of the valve cavity due to the continuous gas supply from the inlet pipe 2. If a reset or opening operation is required, the control system first sends a signal to activate the solenoid valve 8, which opens the internal pipe 7 inside the lifting rod 5. At this time, the high-pressure gas at the bottom of the valve body 1 flows upward through the internal pipe 7 that passes through the sealing plate 6 and the lifting rod 5, and enters the temporary storage cylinder 3 installed on the top of the mounting plate 18 for temporary storage, thereby achieving pressure balance and reducing the operating torque required to open the sealing plate 6. During this process, the sealing plate 6 is subjected to... The driving mechanism or differential pressure causes the lifting rod 5 to move up and down. The external threads 11 at the top and bottom of the outer ring of the lifting rod 5 are precisely engaged with the internal threads of the inner rings of the top adjusting cylinder 17 and the bottom adjusting cylinder 14, respectively, to ensure smooth lifting and reliable sealing. The temporary storage cylinder 3 forms a nested adjustment structure through the top adjusting cylinder 17 fixed at its bottom center and the bottom adjusting cylinder 14 fixed at the top center of the mounting plate 18. The bottom of the temporary storage cylinder 3 is also connected to the outer ring of the bottom adjusting cylinder 14 through a connecting structure. This connecting structure includes a connecting ring 16 fixed to the outer ring of the bottom adjusting cylinder 14 and two metal connectors at both ends that are respectively connected to the connecting ring 16 and the bottom of the temporary storage cylinder 3. Rod 15, with its top end fixed to the temporary storage cylinder 3 by bolts, forms a rigid support frame, effectively preventing the temporary storage cylinder 3 from shifting due to internal pressure or vibration, and ensuring that the top adjusting cylinder 17 and the bottom adjusting cylinder 14 are always coaxial. When temporary storage is complete or the temporary storage volume needs to be adjusted, the operator can rotate the rotating rod 13, one end of which is threaded through the top of the temporary storage cylinder 3 and connected to the top of the outer ring of the lifting rod 5 through a docking structure. This docking structure consists of a U-shaped frame 12, with its two vertical ends fixed to both sides of the lifting rod 5 and its top fixed to the end of the rotating rod 13, so that the rotational torque is evenly transmitted, avoiding uneven force on the lifting rod 5 and jamming. Adjustment complete. Afterwards, the gas temporarily stored in the storage cylinder 3 is not directly vented, but is orderly discharged through a conveying structure. This conveying structure includes a flow pipe 10 with one end connected to the storage cylinder 3 and the other end connected to the exhaust pipe 4, and a solenoid valve 2 9 installed on one side of the flow pipe 10. By controlling the opening and closing of the solenoid valve 2 9, the gas can be controllably sent into the exhaust pipe 4 for downstream reuse or safe discharge. The entire device is detachably fixed to the top of the valve body 1 by several positioning screws. The bottom of the mounting plate 18 is also provided with a sealing ring to ensure that the high-pressure gas will not leak from the connection gap, and at the same time, it is convenient to quickly disassemble the storage cylinder 3 and related components for cleaning or maintenance during later maintenance.

[0028] This technical solution, through the coordinated operation of all structures including valve body 1, inlet pipe 2, temporary storage cylinder 3, exhaust pipe 4, lifting rod 5, sealing plate 6, internal pipe 7, solenoid valve 1 8, solenoid valve 2 9, flow pipe 10, U-shaped frame 12, rotating rod 13, bottom adjusting cylinder 14, connecting rod 15, connecting ring 16, top adjusting cylinder 17, mounting plate 18, sealing ring, and positioning screw, systematically solves the problems of existing internal balance devices lacking pressure relief and temporary storage functions, leading to direct exhaust waste and safety risks. Internal pipe 7 and solenoid valve 1 8 form a controllable flow channel, allowing high-pressure gas to enter the temporary storage cylinder 3 for buffering before resetting, avoiding instantaneous leakage. Pressure impact; the temporary storage cylinder 3 achieves high stability installation and precise guidance through the threaded engagement of the top adjusting cylinder 17 and the bottom adjusting cylinder 14, as well as the rigid support of the connecting rod 15 and the connecting ring 16, ensuring sealing performance; the metal connecting rod 15 and the bolt connection method take into account both strength and maintainability; the docking structure composed of the U-shaped frame 12 and the rotating rod 13 ensures smooth and precise adjustment operation; the conveying structure composed of the solenoid valve 2 9 and the flow pipe 10 enables the controllable emission or reuse of gas, significantly reducing energy waste; the detachable mounting plate 18, together with the sealing ring and the positioning screw, greatly improves the convenience of maintenance while ensuring long-term sealing.

[0029] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. An internal balancing device for a compressed gas shut-off valve, characterized in that, include: The valve body includes an intake pipe connected to one side of the valve body and an exhaust pipe connected to the other side of the valve body. A mounting plate is detachably connected to the top of the valve body. A temporary storage cylinder is provided on the top of the mounting plate. A bottom adjusting cylinder is fixedly connected to the center of the top of the mounting plate. A top adjusting cylinder is fixedly connected to the center of the bottom of the temporary storage cylinder. The bottom of the temporary storage cylinder is connected to the outer ring of the bottom adjusting cylinder through a connecting structure. The valve body is provided with a sealing plate inside. A lifting rod with one end passing through the bottom adjusting cylinder and the top adjusting cylinder is fixedly connected to the top of the sealing plate. The top and bottom of the outer ring of the lifting rod are provided with external threads, and the inner rings of the bottom adjusting cylinder and the top adjusting cylinder are provided with internal threads. The lifting rod has an internal tube inside. One end of the internal tube passes through the end of the lifting rod and the sealing plate and communicates with the bottom of the valve body. The other end passes through the top of the lifting rod and communicates with the inside of the temporary storage cylinder. A solenoid valve is connected to the top of the internal tube. A rotating rod is connected to the top of the outer ring of the lifting rod through a docking structure. One end of the rotating rod is threaded through the top of the temporary storage cylinder. One side of the temporary storage cylinder is connected to the exhaust pipe through a conveying structure.

2. The internal balancing device for a compressed gas shut-off valve according to claim 1, characterized in that, The connecting structure includes a connecting ring and two connecting rods. The connecting ring is fixedly connected to the outer ring of the bottom adjusting cylinder. One end of each connecting rod is connected to the connecting ring, and the other end is connected to the bottom of the temporary storage cylinder.

3. The internal balancing device for a compressed gas shut-off valve according to claim 1, characterized in that, The mounting plate is connected to the top of the valve body by several positioning screws, and a sealing ring is connected to the bottom of the mounting plate.

4. The internal balancing device for a compressed gas shut-off valve according to claim 2, characterized in that, The connecting rod is made of metal, and its top end is fixedly connected to the bottom of the temporary storage cylinder with bolts.

5. The internal balancing device for a compressed gas shut-off valve according to claim 3, characterized in that, The docking structure includes a U-shaped frame, with the two vertical ends of the U-shaped frame fixedly connected to both sides of the lifting rod, and the end of the rotating rod fixedly connected to the top of the U-shaped frame.

6. The internal balancing device for a compressed gas shut-off valve according to claim 5, characterized in that, The conveying structure includes a flow pipe and a second solenoid valve connected to one side of the flow pipe. One end of the flow pipe is connected to a temporary storage cylinder, and the other end is connected to an exhaust pipe.

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